3x2 + 5x – 8 = 0 Help pls! I don’t need the answer I just need to know the steps on how to solve it! Thank you, your very much appreciated :)

What number should be added to both sides of the equation to complete this square? x^2-10x=7

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

He ! a group of farmers planned to clean 80 acres of wheat per day to finish the work on schedule. right before the work started, they received a new piece of machinery that them clean 10 more acres per day than originally planned. as a result of increased productivity in the last day before the deadline they only had to clean 30 acres. how many acres of wheat did the group of farmers have to clean?